Washington Nationals' Bryce Harper eyes the ball during batting practice before the game against the Arizona Diamondbacks at Nationals Park in Washington on Tuesday, May 1, 2012. (AP Photo/Susan Walsh)
Washington Nationals starting pitcher Gio Gonzalez throws to the Los Angeles Dodgers during the first inning of a baseball game in Los Angeles, Sunday, April 29, 2012. (AP Photo/Chris Carlson)
Pastor Joel Osteen of Lakewood Church, right, and his wife Victoria stand for the National Anthem prior to a Washington Nationals baseball game against the Houston Astros in Washington, Monday, April 16, 2012. (AP Photo/Ann Heisenfelt)
Washington Nationals left fielder Bryce Harper warms up prior to their baseball game against the Los Angeles Dodgers on Saturday, April 28, 2012, in Los Angeles. (AP Photo/Mark J. Terrill)
Los Angeles Dodgers' Matt Kemp, left, congratulates Los Angeles Dodgers' Andre Ethier after he hit a two-run home run during the first inning against the Washington Nationals on Friday, April 27, 2012, in Los Angeles. (AP Photo/Mark J. Terrill)
San Diego Padres pinch hitter Mark Kotsay hits a two-run double off of Washington Nationals reliever Tyler Clippard in the eighth inning Thursday in San Diego. The Nats lost 2-1. (AP Photo/Lenny Ignelzi)
Washington Nationals starter Stephen Strasburg throws a pitch in the fifth inning against the Miami Marlins at Nationals Park in Washington on Saturday, April 21, 2012. The Nationals won 3-2 in 10th innings. (AP Photo/Jacquelyn Martin)
Washington Nationals' Roger Bernadina, second from left, and Jayson Werth, right, high-five behind Rick Ankiel (24) after defeating the San Diego Padres 7-2 on Wednesday, April 25, 2012, in San Diego. (AP Photo/Lenny Ignelzi)
Washington Nationals' Chad Tracy watches his pinch-hit single go through the middle of the infield and drive in two runs against the San Diego Padres during the seventh inning of a baseball game, Tuesday, April 24, 2012, in San Diego. (AP Photo/Lenny Ignelzi)